G. Giro et al., Organic light-emitting device with a mixed ligand 8-quinolinolato aluminium chelate as emitting and electron transporting material, SYNTH METAL, 123(3), 2001, pp. 529-533
Double layer (DL) electroluminescent devices, made with TPD (75%) in polyca
rbonate (PC) and with a mixed ligand 8-quinolinolato aluminium chelate as e
lectron transporting and emitting material, show higher electroluminescence
(EL) quantum yield (2.2%) and an increased blue EL emission in comparison
with Tris-(8-hydroxyquinolinate)Al(III) (Alq(3)). The solid state photolumi
nescence (PL) quantum yield is as high as 60%, about five-fold the Alq3 val
ue. In spite of the high PL yield, EL efficiency is not as much high; this
can be attributed to a strong electron mobility dependence on the electric
field, which contributes to a slower increase with the field of the EL quan
tum yield. (C) 2001 Elsevier Science B.V. All rights reserved.